package com.auto.netty.websocket;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;

import java.time.LocalDateTime;

public class MyWebsocketServerHandler extends SimpleChannelInboundHandler<TextWebSocketFrame> {

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, TextWebSocketFrame msg) throws Exception {
        System.out.println("服务器接收到消息 " + msg.text());

        //回复消息
        ctx.channel().writeAndFlush(
                new TextWebSocketFrame("服务器时间" + LocalDateTime.now() + " " + msg.text()));
    }

    /**
     * 当web客户端连接后，触发该方法
     *
     * @param ctx
     * @throws Exception
     */
    @Override
    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
        //id表示唯一的值，LongText是唯一的，ShortText不是唯一的
        System.out.println("handlerAdded被调用" + ctx.channel().id().asLongText());
        System.out.println("handlerAdded被调用" + ctx.channel().id().asShortText());
    }

    @Override
    public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
        System.out.println("handlerRemoved被调用" + ctx.channel().id().asLongText());
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        System.out.println("发生异常" + cause.getMessage());
        ctx.close();
    }
}
